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    <title>商务合作</title>

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        *{
            padding: 0;
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        }
        .nav-a1{
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        a{
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        }
        .main{
            height: 400px;
            width: 90%;
            margin: 0 5%;
            margin-top: 160px;
            display: flex;
            flex-flow: row wrap;
            justify-content: space-around;
        }
        .imgdiv{
            width: 330px;
            height: 330px;
            overflow: hidden;
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        .box{
            transition: box-shadow, 0.3s;
        }
        .box:hover{
            box-shadow: rgb(145, 143, 143) 0 0 20px;
        }
        .box:hover img{
            width: 360px;
            margin: -15px;
        }
        .box:hover .line{
            width: 330px;
        }
        .img{
            margin-top: 15px;
            margin-left: 15px;
            width: 300px;
            transition-property: width, height, margin;
            transition-duration: 0.5s;
        }
        .line{
            margin-top: 30px;
            width: 0px;
            height: 2px;
            background-color: rgba(187, 179, 179, 0.795);
            transition: width, 0.3s;
        }
        .text{
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            text-align: center;
            font-size: 24px;
            color: black;
            padding: 20px 0;
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        <a class="nav-a1 businesslev" href="./book.html">创业计划书</a>
        <a class="businesslev" href="./product.html">产品服务</a>
        <a class="active navbusniess" href="./business.html">商务合作∨</a>
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        <a href="./business1.html" target="_blank"><div class="business business1">AR职业教育</div></a>
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